System and Method for Dynamically Configurable Air Interfaces

ABSTRACT

A method of transmitting includes categorizing a transmission between the first device and a second device as one of a plurality of transmission types, and selecting an air interface from a plurality of air interface candidates in accordance with the transmission as categorized. The method also includes sending the transmission to the second device using the selected air interface.

This patent application is a continuation of U.S. Non-ProvisionalApplication No. 13/669,371, filed on Nov. 5, 2012, entitled “System andMethod for Dynamically Configurable Air Interfaces,” which claims thebenefit of U.S. Provisional Application No. 61/669,997, filed on July10, 2012, entitled “System and Method for Dynamic Software-ConfiguredAir Interface”, all of which applications are hereby incorporated hereinby reference as if reproduced in their entireties.

TECHNICAL FIELD

The present disclosure relates generally to digital communications, andmore particularly to a system and method for dynamically configurableair interfaces.

BACKGROUND

An air interface is the wireless communications link between two or morecommunicating devices, such as an evolved NodeB (also commonly referredto as a NodeB, a base station, a transmit point, a remote radio head, acommunications controller, a controller, and the like) and a userequipment (UE) (also commonly referred to as a mobile station, asubscriber, a user, a terminal, a phone, and the like). Typically, bothcommunicating devices need to know the air interface in order tosuccessfully transmit and receive a transmission.

SUMMARY OF THE DISCLOSURE

Example embodiments of the present disclosure which provide a system andmethod for dynamically configurable air interfaces.

In accordance with an example embodiment of the present disclosure, amethod for transmitting is provided. The method includes categorizing,by a first device, a transmission between the first device and a seconddevice as one of a plurality of transmission types, and selecting, bythe first device, an air interface from a plurality of air interfacecandidates in accordance with the transmission as categorized. Themethod also includes sending, by the first device, the transmission tothe second device using the selected air interface.

In accordance with another example embodiment of the present disclosure,a method of receiving is provided. The method receiving, by a receivingdevice, information about a selected air interface for a transmissionfrom a source device to a destination device, wherein the selected airinterface is selected in accordance with input parameters of thetransmission. The method also includes receiving, by the receivingdevice, the transmission from the source device using the selected airinterface.

In accordance with another example embodiment of the present disclosure,a first device is provided. The first device includes a processor, and atransmitter operatively coupled to the processor. The processorcategorizes a transmission from the first device to a second device asone of a plurality of transmission types, and selects an air interfacefrom a plurality of air interface candidates in accordance with thetransmission as categorized. The transmitter sends the transmission tothe second device using the selected air interface.

One advantage of an embodiment is that the air interface may bedynamically configured to meet the requirements of a transmissionbetween two or more communicating devices. Therefore, the communicationsperformance may be optimized to meet the requirements of thetransmission, thereby improving overall communications systemperformance.

A further advantage of an embodiment is that the granularity of thedynamic configuration of the air interface can be varied to meetperformance requirements as well as computational resource availability.Therefore, the dynamic configuration of the air interface may be setaccording to available computational resources.

BRIEF DESCRIPTION OF THE DRAWINGS

For a more complete understanding of the present disclosure, and theadvantages thereof, reference is now made to the following descriptionstaken in conjunction with the accompanying drawing, in which:

FIG. 1 illustrates an example heterogeneous communications systemaccording to example embodiments described herein;

FIG. 2 illustrates an example air interface according to exampleembodiments described herein;

FIG. 3 illustrates a high level view of an example air interfaceconfigured to meet transmission requirements according to exampleembodiments described herein;

FIG. 4 illustrates a high level view of an example device for selectingan air interface to meet transmission requirements for a communicatingdevice pair according to example embodiments described herein;

FIG. 5 illustrates a flow diagram of example operations in a device asthe device selects an air interface for a transmission occurring in acommunicating device pair, wherein the selecting of the air interface isin accordance with transmitting condition, receiving condition, and/ortransmission content of the transmission according to exampleembodiments described herein;

FIG. 6 illustrates a flow diagram of example operations in a device asthe device selects an air interface for a transmission occurring in acommunicating device pair, wherein the selecting of the air interface isin accordance with transmission requirements of the transmissionaccording to example embodiments described herein;

FIG. 7 illustrates a flow diagram of example operations in atransmission destination device as the transmission destination devicereceives a transmission over a dynamically configurable air interfaceaccording to example embodiments described herein;

FIG. 8 illustrates a diagram of an example first communications deviceaccording to example embodiments described herein; and

FIG. 9 illustrates a diagram of an example second communications deviceaccording to example embodiments described herein.

DETAILED DESCRIPTION OF ILLUSTRATIVE EMBODIMENTS

The operating of the current example embodiments and the structurethereof are discussed in detail below. It should be appreciated,however, that the present disclosure provides many applicable inventiveconcepts that can be embodied in a wide variety of specific contexts.The specific embodiments discussed are merely illustrative of specificstructures of the disclosure and ways to operate the disclosure, and donot limit the scope of the disclosure.

With respect to an air interface adaptation signaling mechanism, a userequipment (UE) informs the network of its capability during the initialaccess. For UE grouping based UE assisted receiving, network and UE canexchange information on the formation of virtual Rx. Once the networkdetermines the best scheme for each block, it communicates the selectionresults with the UEs. Generally, there are two types of signaling:explicit and implicit. High layer signaling can be used for explicitsignaling, such as waveform (WF) selection and cyclic prefix (CP)selection. Implicit signaling can be used for fixed mapping relationbetween the selected scheme of each building block, and for thecombination of the service type and the transmitting/receivingcondition, such as time transmission interval (TTI) selection,re-transmission scheme selection, coding/modulation scheme selection andmultiple access scheme selection. Explicit signaling can be used tooverride the implicit signaling.

One embodiment of the disclosure relates to dynamically configurable airinterfaces. For example, at a transmission sending device, thetransmission sending device categorizes a transmission as one of aplurality of transmission types having an input parameter. Thetransmission sending device selects an air interface from a plurality ofair interface candidates according to the categorized transmission. Thetransmission sending device sends the transmission to the transmissionreceiving device using the selected air interface. As another example,at a transmission receiving device, the transmission receiving devicereceives information about a selected air interface for a transmissionfrom a transmission sending device and receives a transmission from thetransmission sending device using the selected air interface.

The present disclosure will be described with respect to exampleembodiments in a specific context, namely a heterogeneous communicationssystem with different transmission source types and/or differenttransmission destination types. The different transmission source typesmay have different transmission capabilities, while the differenttransmission destination types may have different receptioncapabilities.

FIG. 1 illustrates a heterogeneous communications system 100. Aheterogeneous communications system 100 may include a plurality oftransmission sending devices, such as an evolved NodeB (eNB) 105, arelay node (RN) no, a remote radio head (RRH) 115. Other examples oftransmission sending devices include network transmit points located inpicocells (e.g., picocell 117), femtocells, low-power cells, full-powercells, and the like. It is noted that many transmission sending devices,especially network side transmission sending devices, may be coupledtogether via a backhaul, which may be wired or wireless. As an example,eNB 105 may be connected to RRH 115 and picocell 117 via backhauls.Heterogeneous communications system 100 may include a plurality oftransmission receiving devices, such as a user equipment (UE) 120, asensor 122, a security system 124, a personal computer (PC) 126, atablet computer 128, a multimedia device 130, a television 132, and thelike. A transmitting-receiving device may be used to refer to atransmission sending device and/or a transmission receiving device. Itis noted that a single device may be both a transmission sending deviceand a transmission receiving devices at different times, in differentconfigurations, and/or with different communications partners. Acommunications controller may be a device configured to regulate thecommunications occurring in communications system 100. Examples ofcommunications controllers include eNBs, a switch coupled to andcontrolling the eNBs, as well as other controlling entities incommunications system 100.

The different transmission sending devices may have differenttransmission capabilities and/or requirements. As an example, an eNB mayhave multiple transmit antenna, while a picocell may not have multipletransmit antenna or a relatively small number of transmit antennas.Additionally, a picocells may transmit at a lower maximum power levelcomparable to that of an eNB. Similarly, a PC may have much higher databandwidth requirements and signal processing capability than a sensor,and a security system may have much stricter reliable message receptionrequirements than a television. Therefore, in a heterogeneouscommunications system, such as heterogeneous communications system 100,different pairs of communicating devices (i.e., a transmission sendingdevice and a transmission receiving device) may have differenttransmission capabilities and/or transmission requirements. Thedifferent transmission capabilities and/or transmission requirementstypically cannot be met optimally by a single air interface or airinterface configuration.

While it is understood that communications systems may employ multipletransmission sending devices capable of communicating with a number oftransmission receiving devices, only a small number of transmissionsending devices and transmission receiving devices are illustrated forsimplicity.

FIG. 2 illustrates a diagram of an air interface 200. Air interface 200comprises a number of building blocks that collectively specify how atransmission is to be made and received. The building blocks of airinterface 200 may include waveform 205, frame structure 210, multipleaccess technique 215, a transmission and/or re-transmission mechanism220, and a coding and modulation technique 225. Waveform 205 may specifya shape and form of a signal being transmitted. Examples of waveformoptions include Low Density Signature Multicarrier Code DivisionMultiple Access (LDS-MC-CDMA), Wavelet Packet Modulation (WPM), FasterThan Nyquist (FTN) Waveform, low Peak to Average Ratio Waveform (lowPAPR WF), Filter Bank Multicarrier (FBMC) Waveform, and the like. Framestructure 210 may specify a configuration of a frame or group of frames.Examples of frame structure options include a configurable multi-leveltransmission time interval (TTI), a fixed TTI, a configurablesingle-level TTI, a co-existence configuration, and the like.

Multiple access technique 215 may specify how access to a channel isgranted for one or more users. Examples of multiple access techniqueoptions include dedicated channel resource (no sharing between multipleusers), contention based shared channel resource, non-contention basedshared channel resource, cognitive radio based access, and the like. Atransmission and/or re-transmission mechanism may specify how atransmission and/or a re-transmission are to be made. Possibletransmission and/or re-transmission mechanism options include those thatspecify a scheduled data pipe size, a signaling mechanism fortransmission and/or re-transmission, a re-transmission mechanism, andthe like. Coding and modulation technique 225 may specify howinformation being transmitted may be encoded (decoded) and modulated(demodulated) for transmission (reception) purposes. Examples of codingand/or modulation technique options include turbo trellis codes, turboproduct codes, fountain codes, hierarchical modulation, low PAPRmodulation, polar codes, and the like.

Since an air interface comprises a plurality of building blocks, andeach building block may have a plurality of candidate selections, it maybe possible to configure a large number of different air interfacecandidates. Each of the different air interface candidates may betargeted to meet a different set of transmission requirements, includingtransmission content, transmit condition, receive condition, and thelike. In general, the transmission requirements specify thetransmission. Then, according to transmission requirements of a pair ofcommunicating transmitting-receiving devices (i.e., the transmissionrequirements for the transmission), one of the different air interfacecandidates that best meet the transmission requirements (and hence thetransmission) may be selected and used for communications between thepair of communicating transmitting-receiving devices.

It is noted that although the discussion focuses on selecting an airinterface for a pair of communicating transmitting-receiving devices (orsimply, communicating device pair), the example embodiments discussedherein may be operable for more than two communicatingtransmitting-receiving devices. As an example, a single transmissionsending device may transmit to a plurality of transmission receivingdevices, where the transmission may be considered to be a singletransmission. As another example, a plurality of transmission sendingdevices may transmit to a single transmission receiving device, wherethe transmission may be considered to be a single transmission. As yetanother example, a plurality of transmission sending devices maytransmit to a plurality of transmission receiving devices, where thetransmission may be considered to be a single transmission. It may bepossible to select an air interface for each single transmission. It maybe possible to decompose the single transmission into multipletransmissions between each pair of communicating transmitting-receivingdevices and select an air interface for each of the multipletransmissions. Therefore, the discussion of a pair of communicatingtransmitting-receiving devices should not be construed as being limitingto either the scope or the spirit of the example embodiments.

FIG. 3 illustrates a high level view of an air interface 300 configuredto meet transmission requirements. Air interface 300 may includebuilding blocks, such as a waveform 310, a frame structure 315, amultiple access technique 320, a data transmission and/orre-transmission technique 325, and a coding and modulation technique330. Each building block of air interface 300 may have an optionselected out of a plurality of possible options that is selected to meetthe transmission requirements, including transmission type, transmitcondition, receive condition, and the like. As an illustrative example,for waveform 310, possible options include LDS-MC-CDMA, WPM, FTN, FBMC,low PAPR WF, and the like. One of the possible options is selected tomeet the transmission requirements. As another illustrative example, forcoding and modulation technique 330, possible options include fountaincodes, hierarchical modulation, low PAPR modulation, polar codes, andthe like. Suitable options are selected to meet the transmissionrequirements.

FIG. 4 illustrates a high level view of a device 400 for selecting anair interface to meet transmission requirements for a communicatingdevice pair. As an example, device 400 may be an entity in acommunications system configured to select an air interface for thecommunications device pair. As another example, device 400 may be acombination of more than one devices configured to select an airinterface for the communications device pair. As another example, device400 may be one of the communicating devices in the communicating devicepair, such as the transmission source device. As another example, device400 may be a centralized entity configured to select an air interfacefor the communications device pairs in the communications system. Asanother example, device 400 may be a centralized entity configured toselect an air interface for the communications device pairs in a portionof the communications system.

Device 400 may include an air interface building block selection unit(AIBBSU) 405 that may be used to select an option for each of thebuilding blocks of an air interface out of a plurality of possibleoptions available for selection for each building block. AIBBSU 405 mayselect the options for the building blocks in accordance withtransmission requirements 410. In other words, AIBBSU 405 may select anair interface out of a plurality of candidate air interfaces inaccordance with transmission requirements 410. Transmission requirements410 may include transmission type (i.e., transmission content), such asvoice, video, music, data, sensor data, telemetry data, multimedia,gaming data, and the like, which may correspond to low delay sensitivitytransmission, medium delay sensitivity transmission, high delaysensitivity transmission, low error tolerance transmission, medium errortolerance transmission, high error tolerance transmission, small packettransmission, large packet transmission, and the like.

Transmission requirements 410 may also include additional requirements,such as data rate, tolerable error rate, real-time restrictions, qualityof service requirements, and the like. Transmission requirements 410 mayalso include transmit condition, which may be information regarding adevice operating as the transmitter in the communicating device pair.Examples of transmit condition may include: number of transmit antenna,available transmission resources, available computational resources,channel condition at the transmitter, and the like. Additional examplesof transmit condition may include: low PAPR tolerance, high PAPRtolerance, low processing power receiver, high processing powerreceiver, low delay spread, high delay spread, and the like.Transmission requirements 410 may also include receive condition, whichmay be information regarding a device operating as the receiver in thecommunicating device pair. Examples of receive condition may include:number of receive antenna, available computational resources, channelcondition at the receiver, UE assisted receiving, non-UE assistedreceiving, and the like.

Transmission requirements 410 may be categorized in a transmissionrequirements categorizing unit 415 to produce a categorized version oftransmission requirements 410. Since transmission requirements 410 mayspan a wide range of possible values, transmission requirementscategorizing unit 415 may reduce the complexity associated with such awide range of possible values by characterizing transmissionrequirements 410. As an illustrative example, consider a situationwherein transmission requirements 410 comprise a medium delaysensitivity transmission with less than 100 ms delay bound. Transmissionrequirements categorizing unit 415 may simplify transmissionrequirements 410 by placing it into a category of medium delaysensitivity transmission with delay bound between 20 ms to 100 ms. Inother words, transmission requirements categorizing unit 415 placestransmission requirements 410 of a transmission into a category tosimplify the selection of the options for each of the plurality ofbuilding blocks of an air interface use to transmit the transmission.

Device 400 may also make use of options for each of the plurality ofbuilding blocks (or simply options) 420. Options 420 may be determined apriori and stored in a memory accessible by AIBBSU 405. Options 420 maybe determined so that air interfaces arising from the selection ofsubsets of options 420 may meet performance criteria for a range ofexpected values of transmission requirements 410. As an illustrativeexample, a first subset of options 420 (which may be referred to as afirst candidate air interface) may result in an air interface that meetsperformance criteria for transmission requirements 410 specifying amedium delay sensitivity transmission with a delay bound in the range of50 ms to 100 ms, while a second subset of options 420 (which may bereferred to as a second candidate air interface) may result in an airinterface that meets performance criteria for transmission requirements410 specifying a small packet transmission at 5 kbps with a very lowfailure rate, and a third subset of options 420 (which may be referredto as a third candidate air interface) may result in an air interfacethat meets performance criteria for transmission requirements 410specifying a large packet transmission at 2 Mbps but can tolerate alarge latency. Alternatively, an external entity, such as a networkentity, an operator of the communications system, a technical standard,and the like, may determine options 420.

Device 400 may also make use of a mapping 425 between options 420 andpossible categories of transmission requirements 410. Mapping 425 mayspecify which subset of options 420, when selected for the buildingblocks of an air interface, will meet a category transmissionrequirements 410. AIBBSU 405 may determine mapping 425. Mapping 425 maybe stored in a memory for subsequent use. Mapping 425 may be stored in atable format, such as a look-up table, that is indexed by thecategorized transmission requirements 410. In other words, AIBBSU 405may make selections of plurality of options 420 for each of theplurality of building blocks to meet the different categories oftransmission requirements 410. As an example, AIBBSU 405 may makeselections of plurality of options 420 to produce an air interface thatmeets performance requirements for a category of medium delaysensitivity transmission. Alternatively, an external entity, such as anetwork entity, an operator of the communications system, a technicalstandard, and the like, may determine mapping 425 between plurality ofoptions 420 and the categorized version of transmission requirements410.

Table 1 illustrates an example mapping of categories of transmissionrequirements 410 to options 420, wherein transmission requirements 410comprises transmission content (e.g., transmission type). Table 2illustrates an example mapping of categories of transmissionrequirements 410 to options 420, wherein transmission requirements 410comprise transmit and/or receive condition. It is noted that blankentries in either Table 1 or Table 2 indicate that any option or adefault option may be used for the corresponding building block.

TABLE 1 Mapping of transmission content to building block options.Trans- Re-trans- Coding & Frame mission mission Modulating Waveformstructure technique technique technique Category selection selectionselection selection selection Low delay Long ARQ Aggressive sensitivityTTI only coding/ modulating Medium Medium ARQ Rateless delay TTI plussensitivity HARQ High Short HARQ Rateless delay TTI only sensitivity Lowerror Orthogonal ARQ Rateless tolerance WF plus HARQ Medium OrthogonalHARQ Rateless error WF only tolerance High Non- No re- Aggressive errororthogonal trans- coding/ tolerance WF mission modulating Small Grant-packet free trans- mission Large Grant- Rateless packet based trans-mission

TABLE 2 Mapping of transmitting condition to building block options.Trans- Re-trans- Coding & Frame mission mission Modulating Waveformstructure technique technique technique Category selection selectionselection selection selection Low Low PAPR PAPR WF tolerance High HighPAPR PAPR WF tolerance Low Orthogonal processing WF power receiver HighNon- processing Orthogonal power WF receiver Low delay Short spread CPHigh Long delay CP spread UE ARQ Hierarchical assisted only modulation;receiving Fountain code; Aggressive coding/ modulating Non-UE Non-assisted hierarchical receiving modulation

Output of transmission requirements categorizing unit 415 (categorizedversion of transmission requirements 410) and mapping 425 may beprovided to AIBBSU 405, which may select options for each of thebuilding blocks of an air interface in accordance with the categorizedversion of transmission requirements 410. The selected options for eachof the building blocks of combine to specify an air interface to be usedto transmit a transmission(s) that meet transmission requirements 410.As an illustrative example, if the categorized version of transmissionrequirements 410 of a transmission is “Low delay sensitivity”, AIBBSU405 may refer to mapping 425 (an example of which is shown in Table 1)and select long TTI for the frame structure building block, ARQ only forthe re-transmission technique building block, and aggressivecoding/modulating for the coding & modulating technique building blockof an air interface intended to transmit the transmission. Otherbuilding blocks of the air interface may be set to default options. Asanother illustrative example, if the categorized version of transmissionrequirements 410 of a transmission is “UE assisted receiving”, AIBBSU405 may refer to mapping 425 (an example of which is shown in Table 2)and select ARQ only for the re-transmission technique building block,and hierarchical modulation for the coding & modulating techniquebuilding block of an air interface intended to transmit thetransmission. Other building blocks of the air interface may be set todefault options.

It is noted that the discussion of FIG. 4 highlights a technique whereinAIBBSU 405 selects options for each building block of an air interfaceall at the same time according to the categorized transmissionrequirements 410. This is analogous to selecting a candidate airinterface out of the plurality of candidate air interfaces. However, itmay be possible for AIBBSU 405 to select an option for each buildingblock of an air interface one building block at a time and have apreviously selected option for a building block potentially impactingthe options available for selection in a later selected building block.In such a configuration, the selection of the options for the buildingblocks of the air interface may follow a tree-like structure.

FIG. 5 illustrates a flow diagram of operations 500 in a device as thedevice selects an air interface for a transmission occurring in acommunicating device pair, wherein the selecting of the air interface isin accordance with transmit condition, receive condition, and/ortransmission content of the transmission. Operations 500 may beindicative of operations occurring in a device, such as device 400, asthe device selects an air interface for a communicating device pair. Thedevice may be a transmission sending device or an entity in acommunications system configured to select an air interface for acommunicating device pair including the transmission receiving device.

Operations 500 may begin with the device generating (predefining) amapping of possible categories of transmit condition, receive condition,and/or transmission content of the transmission to building blockoptions (block 505). Examples of transmission requirements may includetransmission content, transmit condition, receive condition, and thelike. The mapping may provide an optimal air interface for each possiblecategory of transmission requirement. The device may generate themapping by selecting options of the building blocks to produce airinterfaces that meet possible transmit condition, receive condition,and/or transmission content of the transmission. In other words, thedevice may configure a candidate air interface for each possiblecategory of transmit condition, receive condition, and/or transmissioncontent of the transmission. The generating of the mapping may beperformed a priori and stored in a memory, for example, for subsequentuse by the device.

Alternatively, the mapping may be generated by a different entity, suchas a network entity, an operator of the communications system, atechnical standard, and the like, and provided to the device. As anexample, the mapping may be stored at a server. As another example, themapping may be transmitted to the device. It is noted that the mappingmay be updated periodically or upon an occurrence of an event. Examplesof events may include the receipt of an instruction to update themapping, a failure of one or more transmissions to meet their respectiveperformance criteria, an error rate (such as frame error rate, bit errorrate, block error rate, and the like) meeting a specified value,significant changes in network topology, significant changes in devicenumbers, significant change of traffic types, failures of one moredevices (such as eNBs, picocells, RRHs, and the like), and the like.Updating the mapping may allow for changing operating conditions,network congestion, traffic patterns, and the like.

The device may receive capability information of the transmissionreceiving device (block 510). The capability of the transmissionreceiving device may play a role in the selection of the air interface.As an example, if the transmission receiving device is incapable ofproviding processing power to decode a transmission encoded using arelatively complex coding & modulating technique, the device may electto not select an air interface that makes use of complex coding &modulating techniques.

The device may determine transmit condition, receive condition, and/ortransmission content of the transmission between the transmissionsending device and the transmission receiving device (block 515). Thetransmit condition, the receive condition, and the transmission contentof the transmission may be categorized into one of a plurality oftransmission types. The transmit condition, the receive condition, andthe transmission content of the transmission (and therefore, thetransmission itself) provide information about requirements of thetransmission that the device needs to meet when the device selects anair interface for the transmission. If the device is the transmissionsending device, the device knows the transmission content and thetransmit condition and the transmission destination device may providereceive condition information to the device. If the device is not thetransmission sending device, then the transmission sending device mayprovide transmission content and transmit condition to the device, andthe transmission receiving device may provide receive condition to thedevice.

The device may categorize the transmit condition, the receive condition,and/or the transmission content of the transmission (block 520). Thetransmit condition, the receive condition, and/or the transmissioncontent of the transmission may be categorized into one of a pluralityof transmission types. Categorizing the transmit condition, the receivecondition, and/or the transmission content (and hence the transmission)may reduce the wide range of possible values of the transmit condition,the receive condition, and/or the transmission content, therebydecreasing the complexity associated selecting options for each possiblevalue. In other words, categorizing the transmit condition, the receivecondition, and/or the transmission content reduces the search space forbuilding block option selection.

The device may select best options for each building block of an airinterface in accordance with the transmit condition, the receivecondition, and/or the transmission content categories and the mapping ofpossible categories of transmit condition, receive condition, and/ortransmission content of the transmission to building block options(block 525). The device may use the transmit condition, the receivecondition, and/or the transmission content categories to select theoptions for each building block of the air interface. In other words,the device may select an air interface from a plurality of air interfacecandidates using the categorized transmission requirements. As anexample, consider the mapping of possible categories of transmitcondition, receive condition, and/or transmission content of thetransmission to building block options arranged as shown in Table 1 orTable 2, the device may use the transmit condition, the receivecondition, and/or the transmission content categories to search in Table1 or Table 2 to select the building block options of the air interface.

The device may provide air interface information, e.g., the buildingblock options to the transmission receiving device (block 530). Thedevice may signal the air interface information to the transmissionreceiving device. The air interface information may be signaled to thetransmission receiving device over a default air interface or apreviously selected air interface. If the device is not the transmissionsending device, then the device may also signal the air interfaceinformation to the transmission sending device. As an example, thedevice may signal indicators for each selected building block option tothe transmission receiving device (and the transmission sending device).As an another example, if the mapping of possible categories of transmitcondition, receive condition, and/or transmission content of thetransmission to building block options is available at the transmissionreceiving device (and the transmission sending device) the device maysignal an indicator of the transmit condition, the receive condition,and/or the transmission content categories used to select the buildingblock options to the transmission receiving device (and the transmissionsending device).

The transmission(s) made by the device may be an explicit transmission,utilizing a control channel dedicated for the transmission suchinformation. The transmission(s) made by the device may be an implicittransmission, wherein the information may be embedded in a controlchannel intended for use in signaling other forms and types ofinformation. The device may transmit the transmission to thetransmission receiving device, if the device is the transmission sendingdevice (block 535). The transmission may be transmitted using the airinterface.

It is noted that categorizing the transmit condition, the receivecondition, and/or the transmission content of the transmission (block520), selecting best options for each building block of an air interfacein accordance with the transmit condition, the receive condition, and/orthe transmission content categories and the mapping of possiblecategories of transmit condition, receive condition, and/or transmissioncontent of the transmission to building block options (block 525), andproviding air interface information, e.g., the building block options tothe transmission receiving device and/or the transmission sending device(block 530) may occur for each transmission to the transmissionreceiving device. Alternatively, blocks 520-530 may take place onceevery specified number of transmissions. Alternatively, blocks 520-530may take place upon an occurrence of an event, such as an error rate, areceived instruction, a change of transmission content, transmittingcondition, and/or receiving condition, and the like. As an example, ifthe transmission sending device receives an instruction from thetransmission receiving device (or some other entity in thecommunications system), the transmission sending device may performblocks 520-530. Alternatively, blocks 520-530 may take place atspecified intervals or time instances. Alternatively, blocks 520-530 maytake place when the transmission receiving device changes location dueto mobility and significantly changes its operating condition. Thedegree to which the operating condition for the transmission receivingdevice changes before blocks 520-530 are performed may be apredetermined or prespecified amount.

FIG. 6 illustrates a flow diagram of operations 600 in a device as thedevice selects an air interface for a transmission occurring in acommunicating device pair, wherein the selecting of the air interface isin accordance with transmission requirements of the transmission.Operations 600 may be indicative of operations occurring in a device,such as device 400, as the device selects an air interface for acommunicating device pair. The device may be a transmission sendingdevice or an entity in a communications system configured to select anair interface for a communicating device pair including the transmissionreceiving device.

Operations 600 may begin with the device generating (predefining) amapping of possible categories of transmission requirements of thetransmission to building block options (block 605). Examples oftransmission requirements may include transmission content, transmitcondition, receive condition, and the like. The mapping may provide anoptimal air interface for each possible category of transmissionrequirement. The generating of the mapping may be performed a priori andstored, for example, in a memory, for subsequent use by the device.

Alternatively, the mapping may be generated by a network entity andprovided to the device. As an example, the mapping may be stored at aserver. As another example, the mapping may be transmitted to thedevice. It is noted that the mapping may be updated periodically or uponan occurrence of an event. Examples of events may include the receipt ofan instruction to update the mapping, a failure of one or moretransmissions to meet their respective performance criteria, an errorrate (such as frame error rate, bit error rate, block error rate, andthe like) meeting a specified value, significant changes in networktopology, significant changes in device numbers, significant change oftraffic types, failures of one more devices (such as eNBs, picocells,RRHs, and the like), and the like. Updating the mapping may allow forchanging operating conditions, network congestion, traffic patterns, andthe like.

The device may receive capability information of the transmissionreceiving device (block 610). The device may determine transmissionrequirements of the transmission (block 615). The transmissionrequirements of the transmission provide information about requirementsof the transmission that the device needs to meet when the deviceselects an air interface for the transmission.

The device may categorize the transmission requirements of thetransmission between the transmission sending device and thetransmission receiving device (block 620). The transmission requirementsof the transmission may be categorized into one of a plurality oftransmission types. Categorizing the transmission requirements (andhence the transmission) may reduce the wide range of possible values ofthe transmission requirements, thereby decreasing the complexityassociated selecting options for each possible value. In other words,categorizing the transmission requirements reduces the search space forbuilding block option selection.

The device may select best options for each building block of an airinterface in accordance with the transmission requirements and themapping of possible categories of transmission requirements of thetransmission to building block options (block 625). The device may usethe transmission requirements categories to select the options for eachbuilding block of the air interface. In other words, the device mayselect an air interface from a plurality of air interface candidatesusing the categorized transmission requirements. As an example, considerthe mapping of possible categories of transmission requirements of thetransmission to building block options arranged as shown in Table 1 orTable 2, the device may use the transmission requirements categories tosearch in Table 1 or Table 2 to select the building block options of theair interface.

The device may provide air interface information, e.g., the buildingblock options to the transmission receiving device (block 630). Thedevice may signal the air interface information to the transmissionreceiving device. The air interface information may be signaled to thetransmission receiving device over a default air interface or apreviously selected air interface. If the device is not the transmissionsending device, then the device may also signal the air interfaceinformation to the transmission sending device. As an example, thedevice may signal indicators for each selected building block option tothe transmission receiving device (and the transmission sending device).As an another example, if the mapping of possible categories of transmitcondition, receive condition, and/or transmission content of thetransmission to building block options is available at the transmissionreceiving device (and the transmission sending device) the device maysignal an indicator of the transmit condition, the receive condition,and/or the transmission content categories used to select the buildingblock options to the transmission receiving device (and the transmissionsending device).

The transmission(s) made by the device may be an explicit transmission,utilizing a control channel dedicated for the transmission suchinformation. The transmission(s) made by the device may be an implicittransmission, wherein the information may be embedded in a controlchannel intended for use in signaling other forms and types ofinformation. The device may transmit the transmission to thetransmission receiving device (block 635). The transmission may betransmitted using the air interface.

FIG. 7 illustrates a flow diagram of operations 700 in a transmissionreceiving device as the transmission receiving device receives atransmission over a dynamically configurable air interface. Operations700 may be indicative of operations occurring in a transmissionreceiving device, such as UE 120, network transmit point, sensor 122,and the like, as the transmission receiving device receives atransmission over a dynamically configurable air interface.

Operations 700 may begin with the transmission receiving deviceinforming a transmission sending device (or an entity configured toselect an air interface) its capabilities (block 705). The capability ofthe transmission receiving device may play a role in the selection ofthe air interface. The transmission receiving device may receivesignaling about selected building block options of the air interface(block 710). The air interface may have been selected in accordance withthe transmission (i.e., its transmission requirements). The signaling ofthe air interface may be in accordance with a default air interface or apreviously used air interface. The signaling may be received in anexplicit transmission, utilizing a control channel dedicated for thetransmission such information. The signaling may be received in animplicit transmission, wherein the information may be embedded in acontrol channel intended for use in signaling other forms and types ofinformation.

As an example, the transmission receiving device may receive indicatorsfor each selected building block option. As an another example, if themapping of possible categories of transmit condition, receive condition,and/or transmission content of the transmission to building blockoptions is available at the transmission receiving device, thetransmission receiving device may receive an indicator of the transmitcondition, the receive condition, and/or the transmission contentcategories used to select the building block options. The transmissionreceiving device may receive, which may include detect and decode, atransmission from the transmission sending device, wherein thetransmission is transmitted using the air interface (block 715).

FIG. 8 illustrates a diagram of a first communications device 800.Communications device 800 may be an implementation of a transmissionsending device or an entity configured to select air interface forcommunicating device pairs. Communications device 800 may be used toimplement various ones of the embodiments discussed herein. As shown inFIG. 8, a transmitter 805 is configured to send messages, and the like,and a receiver 810 is configured to receive messages, and the like.Transmitter 805 and receiver 810 may have a wireless interface, awireline interface, or a combination thereof.

A device capabilities processing unit 820 is configured to processinformation about capabilities of a transmission receiving device, whichmay be used in the selection of building block options of an airinterface. An transmission parameters processing unit 822 is configuredto process transmission requirements, including transmission content,transmit condition, receive condition, and the like, of a transmissionfrom communications device 800. A category selecting unit 824 isconfigured to categorize (or characterize) transmission requirements.Category selecting unit 824 helps to reduce possible values oftransmission requirements and simplifies configuring the air interface.An option selecting unit 826 is configured to select options of buildingblocks of an air interface according to the categorized transmissionrequirements. As an example, option selecting unit 826 utilizes a table,such as Table 1 or Table 2, to select options of building blocks of theair interface. A signaling unit 828 is configured to signal informationabout the air interface to the transmission receiving device or theentity configured to select air interfaces. A memory 830 is configuredto store transmission requirements categories, building block options,selected options of building blocks, categorized transmissionrequirements, and the like.

The elements of communications device 800 may be implemented as specifichardware logic blocks. In an alternative, the elements of communicationsdevice 800 may be implemented as software executing in a processor,controller, application specific integrated circuit, or so on. In yetanother alternative, the elements of communications device 800 may beimplemented as a combination of software and/or hardware.

As an example, transmitter 805 and receiver 810 may be implemented as aspecific hardware block, while device capabilities processing unit 820,transmission requirements processing unit 822, category selecting unit824, option selecting unit 826, and signaling unit 828 may be softwaremodules executing in a processor 815, such as a microprocessor, adigital signal processor, a custom circuit, or a custom compiled logicarray of a field programmable logic array. Device capabilitiesprocessing unit 820, transmission requirements processing unit 822,category selecting unit 824, option selecting unit 826, and signalingunit 828 may be modules stored in memory 830.

FIG. 9 illustrates a diagram of a second communications device 900.Communications device 900 may be an implementation of a transmissionreceiving device of a communicating device pair. Communications device900 may be used to implement various ones of the embodiments discussedherein. As shown in FIG. 9, a transmitter 905 is configured to sendmessages, and the like, and a receiver 910 is configured to receivemessages, and the like. Transmitter 905 and receiver 910 may have awireless interface, a wireline interface, or a combination thereof.

A device capabilities informing unit 920 is configured to provideinformation regarding capabilities of communications device 900 to atransmission sending device or an entity configured to select an airinterface. A signaling unit 922 is configured to signal the informationregarding capabilities of communications device 900. A detecting /decoding unit 924 is configured to detect and decode a transmissionintended for communications device 900. A memory 930 is configured tostore device capabilities, detected signals, decoded signals, and thelike.

The elements of communications device 900 may be implemented as specifichardware logic blocks. In an alternative, the elements of communicationsdevice 900 may be implemented as software executing in a processor,controller, application specific integrated circuit, or so on. In yetanother alternative, the elements of communications device 900 may beimplemented as a combination of software and/or hardware.

As an example, transmitter 905 and receiver 910 may be implemented as aspecific hardware block, while device capabilities informing unit 920,signaling unit 922, and detecting/decoding unit 924 may be softwaremodules executing in a processor 915, such as a microprocessor, adigital signal processor, a custom circuit, or a custom compiled logicarray of a field programmable logic array. Device capabilities informingunit 920, signaling unit 922, and detecting/decoding unit 924 may bemodules stored in memory 930.

In an embodiment, a method for adaptively selecting an air interface ina wireless network, the method comprising: defining building blocks ofthe air interface; defining categories of air interface building blocks;generating candidate solutions for each category of each block;determining a category of each air interface building block based oncharacteristics of a transmission condition and a transmission content;determining the air interface by selecting a best candidate solution foreach air interface building block in accordance with the determined airinterface categories; and signaling the determined air interface to aterminal in the wireless network.

In an embodiment, an wireless network management device for adaptivelyselecting an air interface in a wireless network, the device comprising:a processor; and a computer readable storage medium storing programmingfor execution by the processor, the programming including instructionsto: define building blocks of the air interface; define categories ofair interface building blocks; generate candidate solutions for eachcategory of each block; determine a category of each air interfacebuilding block based on characteristics of a transmission condition anda transmission content; determine the air interface by selecting a bestcandidate solution for each air interface building block in accordancewith the determined air interface categories; and cause the determinedair interface to be signaled to a terminal in the wireless network.

In an embodiment, a method for transmitting, the method comprising:categorizing, by a first device, a transmission between the first deviceand a second device as one of a plurality of transmission types;selecting, by the first device, an air interface from a plurality of airinterface candidates in accordance with the transmission as categorized;and sending, by the first device, the transmission to the second deviceusing the selected air interface.

Optionally, in any of the preceding aspects, another implementation ofthe aspect provides that the method further includes informing thesecond device of the selected air interface.

Optionally, in any of the preceding aspects, another implementation ofthe aspect provides that: wherein the air interface comprises aplurality of building blocks, and wherein informing the second devicecomprises transmitting indications of options associated with thebuilding blocks of the selected air interface to the second device.

Optionally, in any of the preceding aspects, another implementation ofthe aspect provides that, wherein the indications are transmitted usinga default air interface.

Optionally, in any of the preceding aspects, another implementation ofthe aspect provides that: wherein the indications are transmitted usinga previously selected air interface.

Optionally, in any of the preceding aspects, another implementation ofthe aspect provides that: wherein the air interface comprises aplurality of building blocks, and wherein the method further comprisespreselecting the air interface for each of the transmission types andits corresponding input parameter by selecting an option for eachbuilding block of the air interface.

Optionally, in any of the preceding aspects, another implementation ofthe aspect provides that: wherein the option selected for each buildingblock provides an optimal solution for a corresponding transmissiontype.

Optionally, in any of the preceding aspects, another implementation ofthe aspect provides that: wherein the preselected air interface for eachof the transmission types are stored in a memory of the first device.

Optionally, in any of the preceding aspects, another implementation ofthe aspect provides that: further comprising retrieving, from a memory,the air interface for each of the transmission types and itscorresponding input parameter by selecting an option for each buildingblock of the air interface.

Optionally, in any of the preceding aspects, another implementation ofthe aspect provides that: further comprising retrieving, from a firstnetwork entity, the air interface for each of the transmission types andits corresponding input parameter by selecting an option for eachbuilding block of the air interface.

Optionally, in any of the preceding aspects, another implementation ofthe aspect provides that: wherein each of the transmission types has aninput parameter.

Optionally, in any of the preceding aspects, another implementation ofthe aspect provides that: wherein the input parameter comprises atransmission content.

Optionally, in any of the preceding aspects, another implementation ofthe aspect provides that: wherein the input parameter comprises at leastone of a transmitting condition at the transmitting device and areceiving condition at the receiving device.

Optionally, in any of the preceding aspects, another implementation ofthe aspect provides that: wherein the air interface comprises at leastone of a waveform building block, a frame structure building block, amultiple access technique building block, a transmission techniquebuilding block, a re-transmission technique building block, and a codingand modulating technique building block.

Optionally, in any of the preceding aspects, another implementation ofthe aspect provides that: wherein the first device comprises one of acommunications controller and a transmitting-receiving device.

In an embodiment, the method comprising: receiving, by a receivingdevice, information about a selected air interface for a transmissionfrom a source device to a destination device, wherein the selected airinterface is selected in accordance with input parameters of thetransmission; and receiving, by the receiving device, the transmissionfrom the source device using the selected air interface.

Optionally, in any of the preceding aspects, another implementation ofthe aspect provides that: wherein receiving the transmission comprisesdetecting and decoding the transmission in accordance with the selectedair interface.

Optionally, in any of the preceding aspects, another implementation ofthe aspect provides that: wherein receiving the information comprisesdetecting and decoding the information in accordance with a default airinterface.

Optionally, in any of the preceding aspects, another implementation ofthe aspect provides that: wherein receiving the information comprisesdetecting and decoding the information in accordance with a previouslyselected air interface.

Optionally, in any of the preceding aspects, another implementation ofthe aspect provides that: wherein the input parameters comprisereceiving condition, and wherein the method further comprisestransmitting the receiving condition to the source device.

Optionally, in any of the preceding aspects, another implementation ofthe aspect provides that: wherein the information is received over adedicated control channel.

Optionally, in any of the preceding aspects, another implementation ofthe aspect provides that: wherein the information is received embeddedin a control channel not intended for signaling the information.

In an embodiment, a first device comprising: a processor configured tocategorize a transmission from the first device to a second device asone of a plurality of transmission types, and to select an air interfacefrom a plurality of air interface candidates in accordance with thetransmission as categorized; and a transmitter operatively coupled tothe processor, the transmitter configured to send the transmission tothe second device using the selected air interface.

Optionally, in any of the preceding aspects, another implementation ofthe aspect provides that: wherein the processor is configured to informthe second device of the selected air interface.

Optionally, in any of the preceding aspects, another implementation ofthe aspect provides that: wherein the air interface comprises aplurality of building blocks, and wherein the processor is configured topreselect the air interface for each of the transmission types and itscorresponding input parameter by selecting an option for each buildingblock of the air interface.

Optionally, in any of the preceding aspects, another implementation ofthe aspect provides that: wherein the processor is configured toretrieve, from a memory, the air interface for each of the transmissiontypes and its corresponding input parameter by selecting an option foreach building block of the air interface.

Optionally, in any of the preceding aspects, another implementation ofthe aspect provides that: further comprising a receiver operativelycoupled to the processor, the receiver configured to receive, from afirst network entity, the air interface for each of the transmissiontypes and its corresponding input parameter by selecting an option foreach building block of the air interface.

Optionally, in any of the preceding aspects, another implementation ofthe aspect provides that: wherein the air interface comprises aplurality of building blocks, and wherein the transmitter is configuredto transmit indications of options associated with the building blocksof the selected air interface to the second device.

Optionally, in any of the preceding aspects, another implementation ofthe aspect provides that: wherein the transmitter is configured totransmit the indications using a default air interface.

Optionally, in any of the preceding aspects, another implementation ofthe aspect provides that: wherein the transmitter is configured totransmit the indications using a previously selected air interface.

Optionally, in any of the preceding aspects, another implementation ofthe aspect provides that: wherein the first device comprises one of acommunications controller and a transmitting-receiving device.

Optionally, in any of the preceding aspects, another implementation ofthe aspect provides that: further comprising a receiver operativelycoupled to the processor, the receiver configured to receive a receivercondition from the second device.

In an embodiment, a method for transmitting over an air interface isprovided. In this embodiment, the method includes obtaining informationindicating a second air interface configuration over a first airinterface configuration. The first air interface configuration isdifferent from the second air interface configuration. The first airinterface configuration and the second air interface configuration eachinclude a combination of two or more building blocks for a waveform, aframe structure, a multiple access technique, a transmission orre-transmission technique, and a coding and modulating technique. Eachbuilding block in the first air interface configuration and the secondair interface configuration have two or more different configurationoptions. The method further includes communicating a transmission to orfrom a second device in accordance with the second air interfaceconfiguration. In one example, the first air interface configuration isa default air interface configuration or a previously selected airinterface configuration. In any one of the above-mentioned examples, orin yet another example, the combination of two or more building blocksin the first air interface configuration includes a first framestructure and the combination of two or more building blocks in thesecond air interface configuration includes a second frame structure,where the first frame structure has a different transmission timeinterval (TTI) length or a different cyclic prefix (CP) length than thesecond frame structure. In any one of the above-mentioned examples, orin yet another example, the information indicating the second airinterface configuration is obtained through explicit signaling orimplicit signaling. In any one of the above-mentioned examples, or inyet another example, the information indicating the second air interfaceconfiguration is received over a dedicated control channel or isembedded in signaling received over a control channel that is notintended for signaling air interface configuration information. Anapparatus for performing this method is also provided.

In yet another embodiment, another method for communicating over an airinterface is provided. In this example, the method includes sendinginformation indicating a second air interface configuration over a firstair interface configuration. The first air interface configuration isdifferent from the second air interface configuration. The first airinterface configuration and the second air interface configuration eachinclude a combination of two or more building blocks for a waveform, aframe structure, a multiple access technique, a transmission orre-transmission technique, and a coding and modulating technique. Eachbuilding block in the first air interface configuration and the secondair interface configuration has two or more different configurationoptions. The method further includes communicating a transmission to orfrom a first device in accordance with the second air interfaceconfiguration. In one example, the first air interface configuration isa default air interface configuration or a previously selected airinterface configuration. In the same example, or another example, thecombination of two or more building blocks in the first air interfaceconfiguration includes a first frame structure and the combination oftwo or more building blocks in the second air interface configurationincludes a second frame structure, where the first frame structure has adifferent transmission time interval (TTI) length or a different cyclicprefix (CP) length than the second frame structure. In any one of theabove-mentioned examples, or in yet another example, the informationindicating the second air interface configuration is obtained throughexplicit signaling or implicit signaling. In any one of theabove-mentioned examples, or in yet another example, the informationindicating the second air interface configuration is received over adedicated control channel or is embedded in signaling received over acontrol channel that is not intended for signaling air interfaceconfiguration information. An apparatus for performing this method isalso provided.

In yet another embodiment, yet another method for communicating over anair interface is provided. In this embodiment, the method includesobtaining information indicating a first TTI selection of a first airinterface configuration. The first air interface configuration is one ofa plurality of candidate air interface configurations of the airinterface. The plurality of candidate air interface configurationsincludes a second air interface configuration that is different than thefirst air interface configuration. The first air interface configurationincludes at least the first TTI selection and a first transmissiontechnique selection. The second air interface configuration comprises asecond TTI selection that is different than the first TTI selection anda second transmission technique selection that is different than thefirst transmission technique selection. One of the first transmissiontechnique selection and the second transmission technique selection is agrant free transmission technique. The method further includescommunicating a transmission with a second device using the first airinterface configuration. In one example, each of the first air interfaceconfiguration and the second air interface configuration furthercomprises at least one of a waveform selection, a multiple accessselection, and a modulation or coding selection. In the same example, orin another example, the information indicating the first TTI selectionis obtained through explicit signaling or implicit signaling. In any oneof the above-mentioned examples, or in yet another example, the firsttransmission technique selection is a grant free transmission techniqueand the second transmission technique selection is a grant basedtransmission technique, or the first transmission technique selection isa grant based transmission technique and the second transmissiontechnique selection is a grant free transmission technique. In any oneof the above-mentioned examples, or in yet another example, theinformation indicating the first TTI selection is received over adefault air interface configuration or a previously selected airinterface. An apparatus for performing this method is also provided.

In yet another embodiment, yet another method for communicating over anair interface is provided. In such an embodiment, the method comprisessending information indicating a first TTI selection of a first airinterface configuration. The first air interface configuration is one ofa plurality of candidate air interface configurations of the airinterface. The plurality of candidate air interface configurationscomprises a second air interface configuration that is different thanthe first air interface configuration. The first air interfaceconfiguration comprises at least the first TTI selection and a firsttransmission technique selection. The second air interface configurationcomprises a second TTI selection that is different than the first TTIselection and a second transmission technique selection that isdifferent than the first transmission technique selection. One of thefirst transmission technique selection and the second transmissiontechnique selection is a grant free transmission technique. The methodfurther includes communicating a transmission with a first device usingthe first air interface configuration. In one example, each of the firstair interface configuration and the second air interface configurationfurther comprises at least one of a waveform selection, a multipleaccess selection, and a modulation or coding selection. In the sameexample, or in another example, the information indicating the first TTIselection is obtained through explicit signaling or implicit signaling.In any one of the above-mentioned examples, or in yet another example,the first transmission technique selection is a grant free transmissiontechnique and the second transmission technique selection is a grantbased transmission technique, or the first transmission techniqueselection is a grant based transmission technique and the secondtransmission technique selection is a grant free transmission technique.In any one of the above-mentioned examples, or in yet another example,the information indicating the first TTI selection is received over adefault air interface configuration or a previously selected airinterface. An apparatus for performing this method is also provided.

In yet another embodiment, yet another method for communicating over anair interface is provided. In such an embodiment, the method comprisesobtaining information indicating a first waveform selection of a firstair interface configuration. The first air interface configuration isone of a plurality of candidate air interface configurations of the airinterface. The plurality of candidate air interface configurationscomprises a second air interface configuration that is different thanthe first air interface configuration. The first air interfaceconfiguration comprises at least the first waveform selection and afirst coding selection. The second air interface configuration comprisesa second waveform selection that is different than the first waveformselection and a second coding selection that is different than the firstcoding selection. One of the first waveform selection and the secondwaveform selection is a non-orthogonal waveform. The method furtherincludes communicating a transmission with a second device using thefirst air interface configuration. In one example, each of the first airinterface configuration and the second air interface configurationfurther comprises at least one of a frame structure selection, amultiple access selection, and a transmission or re-transmissionselection. In the same example, or in another example, the informationindicating the first waveform selection is obtained through explicitsignaling or implicit signaling. In any one of the above-mentionedexamples, or in yet another example, the first waveform selection is anorthogonal waveform and the second waveform selection is anon-orthogonal waveform, or the first waveform selection is anon-orthogonal waveform and the second waveform selection is anorthogonal waveform. In any one of the above-mentioned examples, or inyet another example, the information indicating the first waveformselection is received over a default air interface configuration or apreviously selected air interface. An apparatus for performing thismethod is also provided.

In yet another embodiment, yet another method for communicating over anair interface is provided. In such an embodiment, the method comprisessending information indicating a first waveform selection of a first airinterface configuration. The first air interface configuration is one ofa plurality of candidate air interface configurations of the airinterface. The plurality of candidate air interface configurationscomprises a second air interface configuration that is different thanthe first air interface configuration. The first air interfaceconfiguration comprises at least the first waveform selection and afirst coding selection. The second air interface configuration comprisesa second waveform selection that is different than the first waveformselection and a second coding selection that is different than the firstcoding selection. One of the first waveform selection and the secondwaveform selection is a non-orthogonal waveform. The method furtherincludes communicating a transmission with a first device using thefirst air interface configuration.

In one example, each of the first air interface configuration and thesecond air interface configuration further comprises at least one of aframe structure selection, a multiple access selection, and atransmission or re-transmission selection. In the same example, or inanother example, the information indicating the first waveform selectionis obtained through explicit signaling or implicit signaling. In any oneof the above-mentioned examples, or in yet another example, the firstwaveform selection is an orthogonal waveform and the second waveformselection is a non-orthogonal waveform, or the first waveform selectionis a non-orthogonal waveform and the second waveform selection is anorthogonal waveform. In any one of the above-mentioned examples, or inyet another example, the information indicating the first waveformselection is received over a default air interface configuration or apreviously selected air interface. An apparatus for performing thismethod is also provided.

In yet another embodiment, yet another method for communicating over anair interface is provided. In such an embodiment, the method includesreceiving higher layer signaling indicating a first waveform selectionof a first air interface configuration. The first air interfaceconfiguration is one of a plurality of candidate air interfaceconfigurations of the air interface. The plurality of candidate airinterface configurations comprises a second air interface configurationthat is different than the first air interface configuration. The firstair interface configuration comprises at least the first waveformselection and a first transmission technique selection. The second airinterface configuration comprises a second waveform selection that isdifferent than the first waveform selection and a second transmissiontechnique selection that is different than the first transmissiontechnique selection. The method further includes communicating atransmission with a second device using the first air interfaceconfiguration. In one example, the first transmission techniqueselection is a grant free transmission technique and the secondtransmission technique selection is a grant based transmissiontechnique, or the first transmission technique selection is a grantbased transmission technique and the second transmission techniqueselection is a grant free transmission technique. In the same example,or in another example, the information indicating the first waveformselection is obtained through explicit signaling or implicit signaling.In any one of the above-mentioned examples, or in yet another example,each of the first air interface configuration and the second airinterface configuration further comprises at least one of a framestructure selection, a multiple access selection, and a re-transmissionselection. In any one of the above-mentioned examples, or in yet anotherexample, the information indicating the first waveform selection isreceived over a default air interface configuration or a previouslyselected air interface. An apparatus for performing this method is alsoprovided.

In yet another embodiment, yet another method for communicating over anair interface is provided. In such an embodiment, the method comprisessending higher layer signaling indicating a first waveform selection ofa first air interface configuration. The first air interfaceconfiguration is one of a plurality of candidate air interfaceconfigurations of the air interface. The plurality of candidate airinterface configurations comprises a second air interface configurationthat is different than the first air interface configuration. The firstair interface configuration comprises at least the first waveformselection and a first transmission technique selection. The second airinterface configuration comprises a second waveform selection that isdifferent than the first waveform selection and a second transmissiontechnique selection that is different than the first transmissiontechnique selection. The method further includes communicating atransmission with a first device using the first air interfaceconfiguration. In one example, the first transmission techniqueselection is a grant free transmission technique and the secondtransmission technique selection is a grant based transmissiontechnique, or the first transmission technique selection is a grantbased transmission technique and the second transmission techniqueselection is a grant free transmission technique. In the same example,or in another example, the information indicating the first waveformselection is obtained through explicit signaling or implicit signaling.In any one of the above-mentioned examples, or in yet another example,each of the first air interface configuration and the second airinterface configuration further comprises at least one of a framestructure selection, a multiple access selection, and a re-transmissionselection. In any one of the above-mentioned examples, or in yet anotherexample, the information indicating the first waveform selection isreceived over a default air interface configuration or a previouslyselected air interface. An apparatus for performing this method is alsoprovided.

Although the present disclosure and its advantages have been describedin detail, it should be understood that various changes, substitutionsand alterations can be made herein without departing from the spirit andscope of the disclosure as defined by the appended claims.

What is claimed is:
 1. A method for transmitting over an air interface,the method comprising: obtaining, by a first device, informationindicating a first TTI selection of a first air interface configuration,the first air interface configuration being one of a plurality ofcandidate air interface configurations of the air interface, wherein theplurality of candidate air interface configurations comprises a secondair interface configuration that is different than the first airinterface configuration, wherein the first air interface configurationcomprises at least the first TTI selection and a first transmissiontechnique selection, wherein the second air interface configurationcomprises a second TTI selection that is different than the first TTIselection and a second transmission technique selection that isdifferent than the first transmission technique selection, and whereinone of the first transmission technique selection and the secondtransmission technique selection is a grant free transmission technique;and communicating, by the first device, a transmission with a seconddevice using the first air interface configuration.
 2. The method ofclaim 1, wherein each of the first air interface configuration and thesecond air interface configuration further comprises at least one of awaveform selection, a multiple access selection, and a modulation orcoding selection.
 3. The method of claim 1, wherein the informationindicating the first TTI selection is obtained through explicitsignaling or implicit signaling.
 4. The method of claim 1, wherein thefirst transmission technique selection is a grant free transmissiontechnique and the second transmission technique selection is a grantbased transmission technique, or the first transmission techniqueselection is a grant based transmission technique and the secondtransmission technique selection is a grant free transmission technique.5. The method of claim 1, wherein the information indicating the firstTTI selection is received over a default air interface configuration ora previously selected air interface.
 6. A first device comprising: aprocessor configured to obtain information indicating a first TTIselection of a first air interface configuration, the first airinterface configuration being one of a plurality of candidate airinterface configurations of the air interface, wherein the plurality ofcandidate air interface configurations comprises a second air interfaceconfiguration that is different than the first air interfaceconfiguration, wherein the first air interface configuration comprisesat least the first TTI selection and a first transmission techniqueselection, wherein the second air interface configuration comprises asecond TTI selection that is different than the first TTI selection anda second transmission technique selection that is different than thefirst transmission technique selection, and wherein one of the firsttransmission technique selection and the second transmission techniqueselection is a grant free transmission technique; and a transceiveroperatively coupled to the processor, the transceiver configured tocommunicate a transmission with a second device using the first airinterface configuration.
 7. The first device of claim 6, wherein each ofthe first air interface configuration and the second air interfaceconfiguration further comprises at least one of a waveform selection, amultiple access selection, and a modulation or coding selection
 8. Thefirst device of claim 6, wherein the information indicating the firstTTI selection is obtained through explicit signaling or implicitsignaling.
 9. The first device of claim 6, wherein the firsttransmission technique selection is a grant free transmission techniqueand the second transmission technique selection is a grant basedtransmission technique, or the first transmission technique selection isa grant based transmission technique and the second transmissiontechnique selection is a grant free transmission technique.
 10. Thefirst device of claim 6, wherein the information indicating the firstTTI selection is received over a default air interface configuration ora previously selected air interface.
 11. A method for communicating overan air interface, the method comprising: sending, by a second device,information indicating a first TTI selection of a first air interfaceconfiguration, the first air interface configuration being one of aplurality of candidate air interface configurations of the airinterface, wherein the plurality of candidate air interfaceconfigurations comprises a second air interface configuration that isdifferent than the first air interface configuration, wherein the firstair interface configuration comprises at least the first TTI selectionand a first transmission technique selection, wherein the second airinterface configuration comprises a second TTI selection that isdifferent than the first TTI selection and a second transmissiontechnique selection that is different than the first transmissiontechnique selection, and wherein one of the first transmission techniqueselection and the second transmission technique selection is a grantfree transmission technique; and communicating, by the second device, atransmission with a first device using the first air interfaceconfiguration.
 12. The method of claim 11, wherein each of the first airinterface configuration and the second air interface configurationfurther comprises at least one of a waveform selection, a multipleaccess selection, and a modulation or coding selection.
 13. The methodof claim 11, wherein the information indicating the first TTI selectionis obtained through explicit signaling or implicit signaling.
 14. Themethod of claim 11, wherein the first transmission technique selectionis a grant free transmission technique and the second transmissiontechnique selection is a grant based transmission technique, or thefirst transmission technique selection is a grant based transmissiontechnique and the second transmission technique selection is a grantfree transmission technique.
 15. The method of claim 11, wherein theinformation indicating the first TTI selection is received over adefault air interface configuration or a previously selected airinterface.
 16. A second device comprising: a processor configured tosend information indicating a first TTI selection of a first airinterface configuration, the first air interface configuration being oneof a plurality of candidate air interface configurations of the airinterface, wherein the plurality of candidate air interfaceconfigurations comprises a second air interface configuration that isdifferent than the first air interface configuration, wherein the firstair interface configuration comprises at least the first TTI selectionand a first transmission technique selection, wherein the second airinterface configuration comprises a second TTI selection that isdifferent than the first TTI selection and a second transmissiontechnique selection that is different than the first transmissiontechnique selection, and wherein one of the first transmission techniqueselection and the second transmission technique selection is a grantfree transmission technique; and a transceiver operatively coupled tothe processor, the transceiver configured to communicate a transmissionwith a second device using the first air interface configuration. 17.The second device of claim 16, wherein each of the first air interfaceconfiguration and the second air interface configuration furthercomprises at least one of a waveform selection, a multiple accessselection, and a modulation or coding selection.
 18. The second deviceof claim 16, wherein the information indicating the first TTI selectionis obtained through explicit signaling or implicit signaling.
 19. Thesecond device of claim 16, wherein the first transmission techniqueselection is a grant free transmission technique and the secondtransmission technique selection is a grant based transmissiontechnique, or the first transmission technique selection is a grantbased transmission technique and the second transmission techniqueselection is a grant free transmission technique.
 20. The second deviceof claim 16, wherein the information indicating the first TTI selectionis received over a default air interface configuration or a previouslyselected air interface.